What Is Flux AI?
Flux is a family of AI image-generation models developed by Black Forest Labs. The models create images from text prompts, edit existing pictures, and help control visual composition. Flux is especially useful for posters, banners, covers, illustrations, and design concepts that involve detailed layouts or lettering.
The family includes several tools for different needs: the affordable Flux 3 Klein, Flux 2 Pro for quality-focused image generation, Flux 2 Flex for fine-tuning quality, and Flux Kontext for editing existing images.
All four versions are available in Neuromia through a single credit balance. There is no mandatory subscription: you pay for individual generations.
New: Flux 3 Klein — Images from 1.76 Credits
Flux 3 Klein is a new lightweight model in the FLUX 3 family, available on Neuromia since October 22, 2026. It handles both text-to-image generation and instruction-based image editing.
Starting at 1.76 credits for a 1K image, Flux 3 Klein is the most affordable Flux model in Neuromia. A 2K image costs 2.75 credits, while 4K costs 7.15 credits. Across Neuromia's image generators, only Z-Image has a lower entry price in the 1K–2K range.
Key Flux 3 Klein features:
- Text-to-image generation. Describe a scene, subject, lighting, style, and composition.
- Instruction-based editing. Upload an image and specify what should change.
- Up to 10 reference images. Refer to uploaded images as
image 1,image 2, and so on in your prompt. - Nine aspect ratios. Choose 1:1, 4:3, 3:4, 3:2, 2:3, 16:9, 9:16, 21:9, or 9:21. Auto mode for editing follows the first uploaded image.
- Detailed prompts. Instructions can contain up to 5,000 characters.
- Cyrillic lettering. The model can render Cyrillic text inside generated images.
A typical generation takes around 25–30 seconds, although actual processing time may vary.
With 10 starter credits, you can create five 1K images using Flux 3 Klein.
Flux Versions: Klein, Pro, Flex, and Kontext
Four Flux models are currently available in Neuromia. Their pricing, resolution options, and editing capabilities differ.
| Version | Best for | Resolution | Price from |
|---|---|---|---|
| Flux 3 Klein | Affordable image generation, editing, multiple references | 1K / 2K / 4K | 1.76 credits |
| Flux 2 Pro | Quality-focused generation and detailed design work | 1K / 2K | 5.5 credits |
| Flux 2 Flex | Fine-tuning generation quality | 1K / 2K | 15.4 credits |
| Flux Kontext | Editing an existing image using one reference | — | 5.5 credits |
Flux 3 Klein vs. Flux 2 Pro
Choose Klein when you want affordable experiments, multiple design variations, or image editing with several references. It supports up to 10 references and output up to 4K.
Flux 2 Pro is designed for quality-focused image generation. It accepts up to eight references and costs 5.5 credits at 1K or 7.7 credits at 2K.
Flux 2 Flex vs. Pro
Flux 2 Flex provides finer control over generation quality. However, Flex costs more than Pro, not less: 15.4 credits at 1K and 26.4 credits at 2K. Both models accept up to eight reference images.
For inexpensive drafts and frequent iterations, start with Flux 3 Klein. Consider Flex when its additional quality controls are relevant to your project.
When Should You Use Flux Kontext?
Flux Kontext is built for editing an existing image. Upload one reference and describe the required changes, such as replacing a background, changing an object's color, or adjusting details. Prompts can contain up to 3,000 characters. Each generation costs 5.5 credits.
Flux vs. Nano Banana vs. GPT Image
These model families are available through the same Neuromia credit balance, but they offer different capabilities and prices.
| Model family | Useful for | Price from |
|---|---|---|
| Flux | Composition, lettering, generation and reference-based editing | 1.76 credits |
| Nano Banana | Photo editing, references, and text within images | 4.4 credits |
| GPT Image | Detailed instructions, image generation and editing | 6.6 credits |
For affordable image generation, Flux 3 Klein is a practical starting point. For editing existing photos, compare Flux Kontext and Nano Banana. If accurate lettering is essential, test more than one model: text rendering depends on the prompt and image content.
How to Generate Images with Flux AI
- Open Neuromia and create an account to receive 10 starter credits.
- Go to the image generation section and select Flux 3 Klein, Flux 2 Pro, Flex, or Kontext.
- Write your prompt describing the subject, style, lighting, and composition.
- Upload reference images when using a supported editing or reference workflow.
- Select the available resolution and aspect ratio, review the credit price, and generate.
- Add more credits to your shared balance whenever you need them.
Credits are charged only for a completed result. If a generation fails, the credits are returned. No monthly subscription is required.
Flux AI Capabilities
- Text within images. Create designs with lettering for posters, banners, and covers. Flux 3 Klein also supports Cyrillic characters.
- Detailed prompt control. Describe the appearance of objects, camera angles, lighting, and layout. Klein accepts up to 5,000 characters.
- Image editing. Use Flux 3 Klein or Kontext to modify uploaded images through natural-language instructions.
- Multiple references. Klein supports up to 10 reference images, Pro and Flex up to eight, and Kontext one.
- Flexible formats. Klein provides nine aspect ratios for square, portrait, and landscape compositions.
- Up to 4K output. Choose between 1K, 2K, and 4K with Flux 3 Klein.
What Can You Create with Flux?
Flux can support a wide range of creative and design projects:
- Posters, banners, and covers with lettering.
- Logo concepts and icons.
- Blog illustrations and social media visuals.
- Product imagery and advertising concepts.
- Website mockups and UI concepts.
- Background replacement and photo editing.
Flux 3 Klein is particularly convenient for experimenting with several ideas at a lower credit cost. Flux 2 Flex is an alternative when more detailed quality controls are needed.
Flux Prompt Examples
Poster with lettering:
Minimalist promotional poster, large headline 'NEW COLLECTION', elegant typography, soft gradient background, balanced composition, clean commercial design, vertical 3:4 aspect ratio.
Product image:
Professional studio product photograph of a skincare bottle on a light stone pedestal, soft natural shadows, warm beige background, centered subject, realistic materials, polished advertising composition.
Multi-reference edit with Flux 3 Klein:
Use the product from image 1. Apply the color palette and overall mood of image 2. Preserve the product's shape and important details while creating a new background with soft studio lighting.
Background replacement with Flux Kontext:
Replace the background of the uploaded image with a bright modern studio. Keep the main subject, its proportions, and its shape unchanged.
Always review generated lettering for spelling and character accuracy before publishing.
Flux Pricing and Credits
Each generation has a credit cost determined by the model and supported resolution.
| Version | 1K | 2K | 4K |
|---|---|---|---|
| Flux 3 Klein | 1.76 | 2.75 | 7.15 |
| Flux 2 Pro | 5.5 | 7.7 | — |
| Flux 2 Flex | 15.4 | 26.4 | — |
| Flux Kontext | 5.5 per image | — | — |
All prices are in Neuromia credits. A dash means the resolution isn't available for that model.
Flux 3 Klein is the lowest-cost entry point into the Flux family. Your 10 starter credits cover five 1K generations. Additional credits can be added as needed, with no mandatory subscription.
The credit cost is displayed before generation. Credits are charged for completed results and returned when generation fails.
Flux Limitations
- Text accuracy is not guaranteed. Generated lettering, including Cyrillic, may contain mistakes.
- Features vary by version. Prices, reference limits, and resolution options are not identical across Flux models.
- Flux generates images, not videos. Neuromia provides separate models for video generation.
- Complex compositions may require iterations. Detailed prompts do not guarantee that every element will appear exactly as requested.
Final Thoughts
Flux gives you several ways to create and edit AI images within a single workspace. The newest addition, Flux 3 Klein, starts at 1.76 credits, accepts up to 10 references, and supports output up to 4K. Flux 2 Pro, Flex, and Kontext offer alternatives for different editing and quality requirements.
Start with 10 bonus credits, generate without a subscription, and choose the Flux model that fits each project.